Improvement in packing for piston-rods



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CHARLES THAYER AND DAVID MCrHERsoN, or ROME, NEW YORK.

Letters. Patent N o. 100,213, dated February 22, 1870.

To all whom it may concern Be it known that we, CHARLES THAYER and DA- VID MCPHERSON, of Rome, in" the county of Oneida,

'and State of New Yprk, have invented a new and irnproved Packing for Piston-Rods; and'we do hereby declare that the following is a full, clear, and exact description thereof', reference being had to the accompanying drawings making part of this speciiication, inl

Figure 1 is a sectional view, which'shows the improved rnode ot' packing the piston-rod of a steamengine. A

Figure 2 is a view of one end of the gland which contains the packing.

Figures 3 and 4 are views of sectional metallic packings which are used in the gland.

Similar letters of reference indicate corresponding parts in the several figures.

The object otthis invention is to provide for readily applying within and removing from a stuing-boxa piston-rod packing.

The nature of our invention consists in a novel construction, arrangement, and combination of parts, viz:

cylindric casing, screw-cap, cylind'rc packing rings,`

spring, and stutng-box, and gland, and steam-passage and chamber, all as will be hereinafter described,

To enable others skilled in the art to understand our invention, we will describe its construction and operation.

In the accompanying drawings- A represents a stufling-box, formed on the head of a steam-cylinder, and v e is a hole through the cylinder-head, which is slightly larger in diameter than the piston-rod `B, but considerably srnaller'in diameter than the interior diameter ofthe stuiiing-box, as shown in fig. 1.

C is the gland which is constructed with a cylindrical case on one end, which is adapted to iit snugly and be packed tightly into the standing-box A, and which has a screw-ring, b, applied to that end which is next the cylinder head. v

The interior diameter of the screw-ring b is slightly greater than the diameter of the piston-rod, so that steam from the interior of the cylinder can enter the chamber g containing the packing and act upon this packingso as to compress it around the piston-rod.

ters Patent, is-

That portion of the annular chamber in casing D which receives the packing, is made somewhat larger in diameter'than that-portion which is nearer the ring b, for the purpose of affording plenty of space around the outside of the packing for receiving steam.

The packing consists of segments h h' made of anysuitable metal or alloy ot metals', and held together by a spring, o, which is titted into an annular groove made into the external surface of the segments h. y

The segments h are miti-ed to receive within them the narrow segments h', which latter break joints with their inclosing segments.

The segments hare reduced ati for receiving upon these reduced portions one end of the helical spring a, the opposite end of which embraces a reduced portieri of the screw-ring b.

It will be seen from the above description that the packing and thespring a, which keeps it' in its place,

are confined within a casing, D, by means ot'a screwring, b, and that the casing D is formed on the gland G, and removableifrom the stuiing-box A with this land.

It will also be seen that the packing is accessible by removing its casing from the box' A and unscrewing the ring b.

When the arts are conined in place by bolts passed through the ange of the" box A and gland C, steam will enter the casing D, through passage e, and compress the packing tightly around the piston-rod.

, We do not claim as new and our invention anything which is shown in the patents granted C. F. Jauret, February 13, 1866, J. Johnson, February 10,1863, and E. T. Prindle, March 27, 1866.

Having described our invention,

What we claim as new, and desire to secure by Let- The c lindric casinrT D screw-ca 11 c'lindrical y o a v 1 -packing rings, lpassage e, chamber g, spring a, and

stuffing-box and gland C A, allconstructed and arranged lsubstantially in the manner shown and described.

CHARLES TH AYER. DAVID MGPHERSON. Witnesses:

A. B. BLAIR, WILLABD RIN'KLE. 

